Your travel eSIM was working perfectly until your Samsung Galaxy S26 installed a software update. After the restart, your phone suddenly shows No Service, mobile data stops working, or your eSIM refuses to connect.
This issue is more common than many travelers realize.
Software updates can sometimes change network settings, disable data roaming, or affect custom APN settings used by certain eSIM providers.
The good news is that most post-update eSIM problems can be fixed in a few minutes.
This guide explains the most common causes and the exact steps to get your travel eSIM working again.
Why Did My eSIM Stop Working After the Update?
Several things can happen after a software update:
1. Data Roaming Was Turned Off
Some updates may change network preferences or reset certain settings. If your travel eSIM requires roaming, mobile data may stop working until roaming is enabled again.
2. APN Settings Changed
Some eSIM providers use custom APN settings. After an update, these settings may be modified or removed.
3. Carrier Services Needs Refreshing
Temporary network data stored by the Carrier Services app can occasionally cause connection issues after major software updates.
4. Data Switching Was Re-Enabled
If you use both your home SIM and a travel eSIM, the update may have changed your data settings, causing the phone to prioritize the wrong line.
5. The Phone Needs a Network Reset
Sometimes the phone simply needs to refresh its network settings after installing new software.
How to Fix a Samsung Galaxy S26 eSIM After an Update
Follow these steps in order.
Step 1: Turn Data Roaming Back On
Open Settings.
Tap Connections.
Select Mobile Networks.
Turn Data Roaming ON.
If you have two SIMs installed, make sure roaming is enabled only for the travel eSIM.
Step 2: Clear Carrier Services Data
Open Settings.
Tap Apps.
Tap the filter icon and enable Show System Apps.
Open Carrier Services.
Tap Storage.
Select Clear Data.
This does not delete your eSIM profile.
Step 3: Check Your APN Settings
If you have signal bars but no internet access:
Open Settings.
Tap Connections.
Select Mobile Networks.
Tap Access Point Names.
Compare the APN settings with the instructions provided by your eSIM company.
If your provider requires a custom APN:
Create a new APN if necessary.
Enter the settings exactly as provided.
Save the new profile.
Select it as the active APN.
Step 4: Verify Mobile Data Settings
Open Settings > Connections > SIM Manager and confirm:
Your travel eSIM is selected for Mobile Data.
Your home SIM is not using mobile data abroad.
Data Switching is turned OFF.
Incorrect data settings are a common cause of connection problems after updates.
Step 5: Reset Mobile Network Settings
If the eSIM still won't connect:
Open Settings.
Go to General Management.
Tap Reset.
Select Reset Mobile Network Settings.
Confirm the reset.
After the reset:
Turn Airplane Mode on.
Wait 30 seconds.
Turn Airplane Mode off.
Wait for the phone to reconnect.
Will a Network Reset Delete My eSIM?
No.
Resetting network settings removes:
Saved Wi-Fi networks
Bluetooth pairings
Temporary network information
It does not remove:
Installed eSIM profiles
Mobile plans
Phone numbers
Should I Delete and Reinstall the eSIM?
Usually, no.
Many travel eSIM activation codes can only be used once. Deleting the profile may prevent you from installing it again without contacting your provider or purchasing another plan.
Try all of the troubleshooting steps above before deleting your eSIM.
When Should You Contact Your Provider?
Contact your eSIM provider if:
The eSIM still shows No Service.
Mobile data does not work after resetting settings.
The APN settings are correct.
Other users are reporting similar issues after the same update.
The provider may be aware of compatibility issues with a specific software version and can provide additional instructions.
Final Verdict
If your Samsung Galaxy S26 eSIM stops connecting after a software update, the issue is usually caused by changed network settings rather than a damaged eSIM.
To restore your connection:
Turn Data Roaming back on.
Clear Carrier Services data.
Verify your APN settings.
Check SIM Manager preferences.
Reset network settings if necessary.
In most cases, these steps restore your travel eSIM and get your mobile data working again within a few minutes.